With the rain pouring, forced to go outside and get soaked (8)
I believe the answer is:
marinade
'go outside and get soaked' is the definition.
I can't judge whether this defines the answer.
'with the rain pouring forced' is the wordplay.
I cannot really understand how this works, but
an anagram of 'rain' is 'arin' which is located in the answer.
'forced' could be 'made' (both can mean coerced) and 'made' is found within the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for marinade that I've seen before include "Mixture for soaking foods before cooking" , "Soak in a mixture before cooking" , "Mixtures used for soaking foods before cooking" , "Spicy liquid for soaking meat or fish" , "thorough soaking" .)